Abstract: Organic montmorillonite-filled polypropylene was prepared by blending functionalized polyethylene wax-organic montmorillonite intercalated master batches with polypropylene．The effects of the organic montmorillonite master batches on the crystallization property of polypropylene were investigated by means of X-ray diffraction‚isothermal and non-isothermal differential scanning calorimetry analyses．Non-isothermal crystallization kinetics of polypropylene was also studied by the modified Avrami theory of Jeziorny．The results indicate that some organic montmorillonites can be intercalated by polypropylene‚leading to an increase in their interlayer distance‚and the crystal form of partial polypropylene is changed fromαtoβwith the existence of organic montmorillonite master batches．The filled polypropylene crystallizes fastest at 400 K．The results also show that organic montmorillonite master batches can effectively accelerate the heterogeneous nucleation of polypropylene and increase its rate of crystallization and crystallizing point‚but they do not affect the rate constant of crystallization． 

Key words: functionalized polyethylene wax, organic montmorillonite, intercalated master batch, filled polypropylene, crystallization property